Water-tight joint for tanks, boats, &amp;c.



No. 795,779. PATENTED JULY 25, 1905.

R. D. MAYO.

WATER TIGHT JDINT FOR TANKS, BOATS, &e. ArrLloA'non FILED Ar3.1,1904.

Fig. i

Roberz- Zav id Maya x Willem/.ww

i j 6mm,

IINITED STATES PATENT OFFIOE.

Specification of Letters Patent.

Patented July 25, 1905.

Application led April '7, 1904:. Serial No. 202,121.

To a/ZZ whom, it -m/cty con/cern.-

Be it known that I, ROBERT DAT/1D MAYO, a

citizen oi' the United States, residing at Grand duce a water-tight joint; and its object is to enable me to construct and ship the several parts in sections, to be assembled at the place where they are to be used. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure l is a transverse section of a tank or boat upon the line a: fr of Fig. 2, showing the joints formed with the edges of the metal projecting outward and the cap outside of the tank. Fig. 2 is a plan of a section of a tank or boat, showing a section of the cap in place over the joint. Fig. 3 is a transverse section of a joint practically upon the line of Fig. 2, showing the manner of applying the retaining-bolts. Fig. 4 is the saine with the joint reversede., the edges of the metal turned in instead of being turned out, as in Figs. l

and 3; and Fig. 5 is a longitudinal section of the same, showing a strengthening brace or rib especially designed for use in,boat construction.

This invention is designed to cover the construction of tanks, boats, &c., of sheet metal, which is formed in sections A, having the adjacent edges a turned out or in suiciently to allow room for bolts or rivets c to pass through them. I then construct a T-shaped rib,which I place with its base B against the surface of the sections and its tongue Z2 between the edges, with a thin packing e `(see Fig. 3) between the base B and the plates A. I then bolt or rivet the edges a together and place a wooden rib O over it, securing the wooden rib to place by passing bolts E through the wood, the metal sections A, and the base B and drawing them securely to place.

In boat construction I prefer that the Whole surface of the sectionsA becovered with canvas D and that the edges of the canvas be clamped between the wooden ribs C and the surface of the rnetalmthat is, when the edges a of the plates A are projected outward-but when the edges project inward,as in Fig. 4, the canvas comes under the base B of the T-rib and the wooden rib C is placed inside of the boat, with a metal cap G over it to sustain the pressure of the bolts E, and I prefer that the edges of this cap G project each side of, the rib to act as a drain for conducting water that may be contained in the boat to the ends of the boat. I design this principally for use in the construction of life-boats of the class secured to me by Letters Patent N o. 768,534, issued August 23,1904, and in this construction I prefer the use of a metal rib F, bent in U form to impart the greatest possible strength with the least possible weight, secured to the sections A, with rivets or bolts passing through the wings f and the plates or sections A.

When the construction is covered with can- Vas, the canvas should be thoroughly covered and impregnated with a ireand water proof paint or othe'r composition of like nature.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

l. In combination with water vessels, metal sections, a joint constructed by turning the edges of the metal at right angles with the sections and perforated for bolts, a T-rib fitted so that the base rests upon the surface of the metal and the tongue between the outturned edges and correspondingly-perforated bolts passing through the outturned edges and the tongue, caps over the edges of the entire joint, and bolts through the base of the T-rib, the metal section and the caps, and the edges of the canvas cover secured between the metal Y and the caps and held iirtnly by the bolts, substantially as and for the purpose set forth.

2. In metal water-vessel construction, sheetmetal sections having the edges turned at right angles, a metal T-rib placed with the tongue between the right-angle edges of the sections and the whole iirmly bolted together, a cap over the edges of the joint, packing between the cap and the metal sections, and bolts'passing through the cap and metal section and the base of the T-rib, and the edges of the canvas cover secured between the metal and the cap and held firmly by the caps, substantially as and for the purpose set Jforth.V

3. In metal water vessels, sheet-metal sections having the edges turned practically at right angles with the metal sheets, a, metal T-rib, placed With the tongue between the surface of the bent-u p edges and bolts through the two edges and the tongue, a Wooden cap over the bent-up edges, a sheet-metal guard over the Wooden caps, substantially as and for the purposeset forth.

Signed at -Grand Rapids, Michigan, this i 30th day of March, 1904.

l ROBERT DAVID MAYo.

In presence of- ITHIEL J.,CILLEY,

H. S. OsBoRN. 

